Sound-box.



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HERMAN L. BERGER ANE EnANcIs c. xNocHEL, or NEWYQRK, n. Y.

SOUND-BOX.

Speeication of Letters Patent.

Patented Non. 2'?, 191W..

Application led August 13, 1917. Serial No. 185,87l.

To aZ/l 'whom z't may concern.'

Be it known that we, HERMAN L. BERGER and FRANCIS C. KNooHEL, citizens of the United States, and residents of the city of New York, borough ofManhattan, in the county and State of New York, have invented a new and Improved Sound-Box, of which the following is a full, clear, and exact description.

This invention relates to sound boxes for talking machines, and has for an object the .provislon of an improved construction 'wherebe transmitted to the stylus.

t5 absolutelyv necessary.

by the vibration of the sound box will not Another object in View is to provide a separate supportfor a stylus formed independent of the parts forming the sound box proper,l in order that none ofthe vibration or movement of the stylus caused by 'the grooves in a record shall be transmitted to the diaphragm.

In the accompanying drawing:

Figure 1 is a rear view of a sound box disclosing an embodiment of the invention.

Fig'. 2 is an edge view of the sound box shown in Fig. 1.

Referring to the accompanying drawing by numerals, 1 indicates a sound box of any desired kind having a tubular extension 2 for being placed in position in theV usual goose neck of a talking machine. The dia- 'phragm of the sound box 1 has an arm 3 connected therewith, said arm being pivotall supported by a journal member 4, rotatab y mounted in the extension 7 of the plate 8. The arm 3 at its lower end carries a stylus 5 held in 'position by 'any suitable means, as for instance thumb screw 6. The plate 8 is `provided with an opening at the upper end sufficiently large to slidingly fit on the extension 2 to which it may be clamped by a set screw 9. A second open'- ing -1O may be provided for the purpose of reducing the weight although this is not The plate .8 is comparatively thick and rigid so that when it is clamped to the tubular member 2 a rigid support is provided for the stylus 5 and the arm 3. The plate 8 is adjustably mounted in a sleeve so as to be moved toward and from the sound box. This movement will naturally shift the position of the stylus arm 3 and the needle 5. This adjustability is provided in order that the vibration set up in the plate 8 and that set up in the stylus 3 may be in a certain sense synchronized for clarifying the sound produced by the diaphragm.

What we claim is:

1. In a device of the character described, a sound box, a supporting sleeve extending therefrom, a stylus arm connected to the diaphragm of the sound box, a plate slidingly mounted on said sleeve, means for clamping said plate at any desired point 0n said sleeve, said sleeve beingl formed with an extension at the lower end, and means for pivotally mounting said stylus arm on said extension.

2. In a deviceof the character described, a sound box provided with ,a sleeve, a stylus arm connected with the diaphragm of the sound box, a plate adjustably mounted on said sleeve so as to be moved toward and from said sound box, said plate being formed with an extension at oneend, and means for engaging said extension and said stylus arm for pivotally mounting the stylus arm on said extension.

3. In a device of the character described, a 

